1,391 research outputs found
Título: Manuductio ad Sacram Scripturam ...
No full textSign.: a-b, A-Z, 2A-2Z, 3APort. con grav. xilAs f. de grav. calc.: "A. Luciani Sculp.
Precautionary principle as a rule of choice with optimism on windfall gains and pessimism on catatrophic losses
No full textInternational audienceThe paper investigates a decision-making process involving both risk and ambiguity. Differently from existing papers [Basili, M., Chateauneuf, A., Fontini, F., 2005. Choices under ambiguity with familiar and unfamiliar outcomes, Theory and Decision 58, 195-207; Chichilnisky, G., 2000. Axiomatic approach to choice under uncertainty with catastrophic risks. Resources and Energy Economics 22, 221-231; Chichilnisky, G., 2002. In: El-Shaarawi, A.,H., Piegorsch, W.W. (Eds.), Catastropic Risks. Encyclopedia of Environmetrics, vol. 1. John Wiley & Sons, Ltd, Chichester, UK, pp. 274-279], we assume that, in a Choquet Expected Utility framework, the decision-maker is pessimistic with respect to unfamiliar (catastrophic) losses, optimistic with respect to unfamiliar (windfall) gains and ambiguity-neutral with respect to the familiar world. A representation of the decision-maker's choice is obtained that mimics the Restricted Bayes-Hurwicz Criterion. In this way a characterization of the Precautionary Principle is introduced for decision-making processes under ambiguity with catastrophic losses and/or windfall gains
Título: Manuductio ad Sacram Scripturam
No full textSign.: a-b, A-Z, 2A-2Z, 3APort. con grav. xilAs f. de grav. calc.: "A. Luciani Sculp.
How to Measure the Economic Impact of Vector-Borne Diseases at Country Level
No full textVector-borne diseases (VBDs) are widespread in less developed countries and reemerging
in developed ones. Available economic studies agree that VBDs have significant effects on countries’
economic outcomes, and affirm that a systematic evaluation of such effects is crucial for the efficient
allocation of resources to health-related priorities. This paper provides a comparative assessment of
available methodologies for measuring the economic impact of VBDs at national level. We review
both macroeconometric and micro-based approaches, and examine advantages and disadvantages of
current methods. We conclude by suggesting possible areas for future research
Kalman filter approach for microwave radiometric profiling of the antarctic atmosphere
No full textThe retrieval of atmospheric parameters such as temperature profiles and columnar water vapor and liquid, or their profiles, can be obtained continuously and automatically in nearly all weather conditions by using microwave radiometers; they are particularly suitable for the development of profiling systems to be installed in hostile environments. Within the framework of the National Program of Researches in Antarctica the authors have already defined the specifications of the radiometric channels, in terms of optimum number, frequencies and sensitivities, of a ground-based temperature profiler [Basili et al., 1994]. In the present paper the authors have assumed the availability of measurements of pressure, temperature and relative humidity at the surface, of two water (vapor and liquid) sensing channels at 23.8 and 36.5 GHz and the temperature sensing radiometric channels selected in a previous analysis along the 60 GHz O2 absorption complex [Basili et al.]. The authors have also considered the addition of the atmospheric sensing channels of SSM/T and/or MSU. On the basis of these measurements and radiosounding data for the Antarctic atmosphere the authors have developed a Kalman filtering algorithm, suitable for the foreseen operational mode of a continuously working profile
Cost efficiency of Italian investment firms
No full textThis paper estimates cost eficiency of italian investment firms during the period 1998-2992. following the stochasticfrontier function approach. Results indicate a significative inefficiency
The managment of the World Heritage Site “Venice and its Lagoon” : state of the art and new challenges
No full textAmbiguity in citizens-politicians interactions
No full textIn the paper a game between private and public individuals is set in order to study
under which conditions the former would like to limit ex-ante the choices of the latter.
Ambiguity, as distinguished from risk, is explicitly introduced by means of capacities and
Choquet Expected Utility. It is shown that constitutional constraints are necessary to
prevent private individuals from being exploited by public individuals whenever citizens
feel a too high level of ambiguity
Quasi-Option Value Under Ambiguity
No full textRea! investments involving irreversibility and ambiguity embed a positive quasi-option
value under ambiguity (q.o.v.a.), which modifies the evaluation ofan investment decision
involving depletion ofnatural resources by increasing the value of delaying. Q.o.v.a. depends
on the specific decision-maker attitude towards ambiguity, expressed by a capacity on the
state space. An empirica! measure of q.o. v .a. is pointed out. Exploiting the properties of a
capacity and its conjugate, the relationship has been established between the upper and lower
Choquet integrai with respect to a subadditive capacity and the bid and ask price ofthe
underlying asset (output) ofthe investment decision. The empirica! measure of q.o.v.a. is
defined as the upper bound ofthe opportunity value. As an example, q.o.v.a. is applied to
evaluate an off-shore petroleum lease under ambiguity.
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